Steam-engine



W. S. FISKE. Steam Engine.

No. 231,551. Patented Aug. 24,1880.

7z, Hm n 1 A i L 7 fi i? a I I' -f. E F i WITNESSES N A ATTORNEY N PEVERS, PHOTO-LITHOGRAPNE Stamford, in the county of Fairfield and State .tion and operation of the same, reference be- UNITED STATES PATENT OFFICE.

WILLIAM S. FISKE, OF STAMFORD, CONNECTICUT.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 231,551, dated August 24, 1880.

Application filed January 12, 1880.

To all whom it may concern Be it known that I, WILLIAM S. FIsKE, of

of Connecticut, haveinvented a new and valuable Improvement in Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description of the construcing had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is arepresentation of a side view, partly in section, of my improved steam-engine. Fig. 2 is a front view with the front of the steam-chest removed.

This invention has relation to steamengines having oscillating cylinders; and it consists in the construction and novel arrangement of parts, as hereinafter shown, described, and set forth in the claims.

In the accompanying drawings, the letter A designates the frame-work of this engine, having the bearings a for the cylinder-journals b, which are bored to receive the steam-supply pipe 0 and the exhaust-pipe 61, respectively, as shown in the drawings.

B represents the oscillating cylinder, around the waist of which are the steam-passages 6, leading from the steam-supply to the steamchest C, which is circular in form, and constructed on the side of the cylinder, between its body and the journal on this side. The wall of this valve-chest next the cylinder forms the seat g of the slide-valve D, which is of circular form and composed of two sections or parts, h, of annular form, arranged one within the other, in order to expand under the pressure of the steam, and thereby preserve tight joints in the seat g and the seat k.

As the axis of the slide-valve is in the vertical plane, by the arrangement referred to a balanced valve results, the pressure on the opposite seats being equalized, and without reference to the weight of the rings constituting the slide-valve. 1

In the seat gare the steam-ports l 1, through which the'steam passes from the valve-chest to the cylinder. The exhaust-steam escapes through these same ports Z 1 into the opening or hollow center of the slide-valve, whence it passes into the air through the pipe d. This pipe is inserted into the plate E, which forms the exterior wall of the valve-chest, and byits interior surface the valve-seat k. This plate carries one of the cylinder-journals, as shown.

Stuffing-boxes are placed in the journals around the steam and exhaust pipes, as shown at m m.

The valve-stem it extends through a slide- Way, a, in the valvechest, and is rigidly connected at its outer end to a link,p, which is transversely arranged, and is provided with an arc-shaped slot, q, the curvature of which is from the center of oscillation of the cylinder, or nearly so. To this link 1) is attached a lug 0r stud, 1", which reciprocates in a slotted guide, F, which is connected to the cylinder, the slot of said guide being in the plane of the valve-stem and of the axis of the cylinder. It is apparent that this guide F oscillates with the cylinder.

G represents the eccentric, which is turned by the piston-rod H, and serves to reciprocate the pitman K in a uniform and steady manner, the head of said pitman being connected to the frame by the engagement of its stud or pin t with the vertically-slotted guide L, which is rigidly connected to said frame below the journal-seat of this side. The head of this pitman also engages the curved link 19 by means of a stud or pin, it, and thereby serves, when operated by the eccentric and guided by the fixed slotted plate L, to move the valvestem in an even and regular manner, said valve-stem being kept true by the oscillating guide F on the cylinder.

I am aware that the patent of King, No. 48,563, of 1865, shows a valve-stem pivoted in the slot of an are which is rigidly connected to a vertical slide, to which the pitman from the eccentric is pivoted, and 1 do not claim such device.

Having described this invention, what 1 claim, and desire to secure by Letters Patent, is-

1. The oscillating cylinder B, having the waste-passages e, the steam-chest C, the vertical annular slide-valve D, its center opening, the vertical valve-seats g and It, the ports 6 l, and the escape-pipe c, all constructed and arranged to operate substantially as shown and described.

2. In an oscillatingsteam-engine, the valve- In testimony that I claim the above I have stem 12, carrying the rigidly-attached slotted hereunto subscribed my name in the presence link 1), the eccentric pitmztn K, pivoted in the often witnesses.

slot; of the valve-stein link and in the vertical \VILLIAM SHERNVOOD FISKE. 5 frame-guide L, and the slotted cylinder-guide Witnesses:

F, engaging the pivot-stud 0f the valve-stein JOHN SOHADE,

link, as specified. CHARLES E. HOLLY. 

